This file is indexed.

/etc/pam.d/sddm-greeter is in sddm 0.14.0-4+deb9u1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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#%PAM-1.0

auth    required        pam_permit.so

@include common-account

# SELinux needs to be the first session rule.  This ensures that any
# lingering context has been cleared.  Without this it is possible that a
# module could execute code in the wrong domain.
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so close
# Create a new session keyring.
session optional        pam_keyinit.so force revoke
session required        pam_limits.so
session required        pam_loginuid.so
@include common-session
# SELinux needs to intervene at login time to ensure that the process starts
# in the proper default security context.  Only sessions which are intended
# to run in the user's context should be run after this.
session [success=ok ignore=ignore module_unknown=ignore default=bad] pam_selinux.so open

@include common-password

# From the pam_env man page
# Since setting of PAM environment variables can have side effects to other modules, this module should be the last one on the stack.

# Load environment from /etc/environment
session required        pam_env.so

# Load environment from /etc/default/locale
session required        pam_env.so envfile=/etc/default/locale